The countdown to Madonna's hyped Super Bowl performance is on, and the singer admits that she's feeling some nerves.

"It's the most nerve-wracking thing I've ever done," Madge told Jay Leno on "The Tonight Show" Monday. "The Super Bowl is the holy of holies. It's like the sacred show of America. And I have to go on in the middle of that holy of holies and put on the greatest show that was ever put on before. That's no pressure."

On top of not really getting a lot of rehearsal time - "they're playing football all day so I don't really have time to do a sound check. It's a little bit like a circus act: Get in there, roll out my carpet, put on my show and get the eff off," she joked - there's also the fact that the Super Bowl halftime isn't the place to exercise a lot of artistic license.

"I enjoyed my first marriage. It's definitely not something I regret," Ritchie, 43, tells the December/January issue of Details. "The experience was ultimately very positive. I love the kids that came out of it, and I could see no other route to take."

Ritchie has a biological child with Madonna, son Rocco, 11, and an adopted son, David Banda, 6. (Madonna also has daughter Lourdes, 14, from a previous relationship, and adopted daughter Mercy James, also 6, from after her split with Guy.)

Like many celebs, Madonna says she didn’t fit in as a teenager. The 53-year-old pop icon tells Harper’s Bazaar that her refusal to conform didn't go over well with her peers.

"I saw how popular girls had to behave to get the boys," she recalls in the magazine’s December issue. "I knew I couldn't fit into that. So I decided to do the opposite. I refused to wear makeup, to have a hairstyle. I refused to shave. I had hairy armpits."

As a result, young Madge’s hirsute state drew insults like “hairy monster” from students at her Midwest high school, where she says she was “tortured.” “The boys in my school would make fun of me,” she says.